Product Introduction
The GT2-71MCP from Keyence is a high-accuracy amplifier unit designed for GT2 series digital contact sensor heads. As a main unit with PNP output, it supports multi-head expansion for flexible measurement system configuration.
Specifically, this amplifier delivers exceptional precision with a display resolution of 0.1 μm and a wide display range from -199.999.9 to 199.999.9. The unit features a clear 6+1/2 digit red LED display, complemented by a 2-color 13-level bar LED indicator for at-a-glance status monitoring.
Technical Specifications
Measurement Performance
The GT2-71MCP achieves remarkable measurement accuracy for demanding industrial applications. Its display resolution of 0.1 μm enables detection of microscopic displacement changes. Meanwhile, the display range spans -199.999.9 to 199.999.9, providing ample headroom for various measurement tasks.
Response time is selectable across six levels: hsp(3)/5/10/100/500/1,000 ms. When paired with GT2-Pxxx series sensor heads, the response options shift to hsp(12)/20/40/400/2,000/4,000 ms to accommodate different head characteristics.
Output and Control
This amplifier unit provides both control outputs and analog output for versatile system integration. The control outputs include HH/HI/GO/LO/LL PNP open collector type, rated for 30 V / 50 mA maximum with residual voltage of 1 V or less.
Additionally, the analog output delivers 4 to 20 mA with a maximum load resistance of 350 Ω. The analog output range can be changed as desired, offering flexibility for connecting to PLCs, data loggers, or other monitoring equipment.
Input Capabilities
Control inputs on the GT2-71MCP accept no-voltage signals for timing, preset, reset, and bank functions. Timing input requires a minimum input time of 2 ms, while preset/reset/bank inputs need 20 ms or more.
Power Requirements
The unit operates on 20 to 30 VDC with 10% ripple (p-p) included, Class 2 rated. Power consumption is 2,700 mW max (90 mA max at 30 V) in normal mode. The Eco power-saving mode reduces consumption to 2,200 mW max (73.3 mA max at 30 V).
Mechanical and Environmental Parameters
Physical Characteristics
The amplifier housing is constructed from polycarbonate, with polyacetal key tops and a PET front sheet. Cable material is PVC. The main unit weighs approximately 70 g, or about 140 g when including the power supply cable.
Environmental Resistance
Operating temperature ranges from -10 to +50 °C (no freezing). However, when expansion units are connected to the GT2-71MCP, the maximum ambient temperature decreases to +45 °C. Relative humidity tolerance is 35 to 85% RH without condensation.
Vibration resistance meets 10 to 55 Hz with double amplitude of 1.5 mm for 2 hours in each of the X, Y, and Z directions.
Installation Guide
DIN-Rail Mounting
The GT2-71MCP mounts directly onto a DIN rail. For secure installation, always mount the DIN rail onto a metal plate. When adding expansion units, always use the end unit (OP-26751) to ensure proper alignment and electrical connections.
Wiring Connections
Brown and blue cables are applicable only to main units including the GT2-71MCP. The orange and green cables serve as analog output cables for this analog type amplifier. When expansion units are connected, the supply voltage range becomes 20 to 30 VDC.
Expansion Considerations
The GT2 series supports up to 15 total units (1 main unit plus 14 expansion units). When connecting 2 to 8 units, control output current must be limited to 20 mA or less. For systems with 9 to 15 units, the current limit drops to 10 mA or less, and residual voltage increases to 1.5 V or lower.
Packaging List
1 × GT2-71MCP Amplifier Unit
1 × Power Supply Cable (GT2-CA2M/CA5M/CA10M, depending on configuration)
1 × Operation Manual
Note: Sensor heads, expansion units, and communication units are sold separately.
FAQ
Q: What is the display resolution of the GT2-71MCP?
A: The GT2-71MCP offers a display resolution of 0.1 μm with a range from -199.999.9 to 199.999.9.
Q: Can I use this amplifier as a standalone unit?
A: Yes, the GT2-71MCP functions as a main unit. It can operate alone or serve as the base for up to 14 expansion units.
Q: What analog output does this model provide?
A: It provides a 4 to 20 mA analog output with maximum load resistance of 350 Ω. The output range is user-configurable.
Q: What is the difference between GT2-71MCP and GT2-71MCN?
A: The GT2-71MCP offers PNP output, while the GT2-71MCN provides NPN output. Both are analog output types with identical measurement specifications.
Q: How does shipping work for this product?
A: We ship worldwide via Fedex, UPS, or DHL. Delivery typically takes 3-7 business days depending on destination.